Median AQI
44
Good
Florida · County air quality · 2025
Pinellas County, Florida
Median AQI 44 (Good). 69.3% of monitored days rated Good, direct from EPA Air Quality System stations.
- 44
- Median AQI
- 69.3%
- Good-air days
- 0
- Unhealthy days
- 30%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Pinellas County's air is good on balance, more polluted than the median US county, a median AQI of 44 with 69.3% of 274 monitored days in the Good band, driven mainly by PM2.5.
- 44
- median AQI · Good
- 69.3%
- days rated Good
- PM2.5
- main pollutant
- 30%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 129.
Data updated July 2026
- Good · 190 d · 69.3%
- Moderate · 83 d · 30.3%
- USG · 1 d · 0.4%
How did Pinellas County's air break down in 2025?
Across 274 monitored days, 190 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 129 (USG).
EPA AQS →Air quality data from EPA Air Quality System (2025). 274 days monitored. Median AQI: 44 (Good).
Insights: Pinellas County, Florida. EPA monitors recorded a median Air Quality Index of 44 across 274 measured days in 2025, earning a Good classification and a Moderate health grade. Of those days, 190 (69%) fell in the Good band (AQI 0–50), 83 (30%) registered Moderate readings, and 1 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 58, while the worst single-day peak hit 129 (USG). Residents averaged about 20.8 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (145 days), Ozone (128 days), CO (1 days). Across the 2020–2025 trend window, good days shifted by -36 and the median AQI moved -2 points, placing the multi-year trajectory at improving. The worst single reading over the 2020–2025 window was AQI 129, usg but never Unhealthy. Nearby counties show comparable readings: Alachua (90.1% good, AQI 37); Baker (69.1% good, AQI 45); Bay (60.6% good, AQI 46); Brevard (89.7% good, AQI 37); Broward (72.4% good, AQI 43); Citrus (67.8% good, AQI 44).
Air Quality Summary
Good Days
69.3%
190 of 274 monitored days
-5.7pp vs 75% target
Max AQI Recorded
129
USG
Health Grade
Moderate
90th-pct AQI 58
Pinellas County, Good days share 69.3%
National avg
Share of monitored days at AQI 0-50 (Good band).
Pinellas County, Unhealthy-or-worse share 0.0%
National avg
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
AQI Day Breakdown (2025)
Distribution of 274 monitored days across EPA AQI categories.
Good
190
69%
Moderate
83
30%
USG
1
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Pinellas County.
- PM2.5 · 145 days · 52.9%
- Ozone · 128 days · 46.7%
- CO · 1 days · 0.4%
Health Impact Assessment
Moderate
Pinellas County's air quality is rated Moderate based on 69.3% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 69.3% of monitored days in 2025, with a median AQI of 44. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 145 of 274 monitored days.
5-Year Air Quality Trend
Air quality is improving in Pinellas County. Best year: 2022 (226 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 226 | 140 | 0 | 0 | 46 | 100 |
| 2021 | 222 | 143 | 0 | 0 | 47 | 95 |
| 2022 | 226 | 139 | 0 | 0 | 46 | 87 |
| 2023 | 217 | 145 | 3 | 0 | 47 | 113 |
| 2024 | 213 | 144 | 3 | 0 | 48 | 132 |
| 2025 | 190 | 83 | 1 | 0 | 44 | 129 |
How does Pinellas County compare?
How Pinellas County compares
Good-day share worse than US avg
Pinellas County 69.3%
Alachua County, Florida 90.1%
US average 76.5%
Median AQI worse than US avg
Pinellas County 44
Alachua County, Florida 37
US average 38
Unhealthy days / yr about average
Pinellas County 0
Alachua County, Florida 0
US average 0
Other Counties in Florida
Air quality comparison for nearby counties in Florida.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Pinellas County.
Baltimore County, Maryland
AQI 44 · 70.4% good
Baltimore (City) County, Maryland
AQI 44 · 68.7% good
Bartholomew County, Indiana
AQI 44 · 69.2% good
Berks County, Pennsylvania
AQI 44 · 65.6% good
Bolivar County, Mississippi
AQI 44 · 70.3% good
Brewster County, Texas
AQI 44 · 69.0% good
What Pinellas County's air means for you
The air here stays in the breathable range year-round, with PM2.5 the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-PM2.5 days, the guide explains what a median of 44 means for exposure. Health guidance
- See how Pinellas County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Pinellas County with its Florida neighbours before drawing a conclusion about the region. All of Florida
Based on 274 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
More Air Quality Data
Air Quality Guides
Frequently Asked Questions
What is the air quality in Pinellas County, Florida? ▼
Pinellas County has a median Air Quality Index (AQI) of 44, rated "Good." 69.3% of monitored days (190 out of 274) had good air quality in 2025.
What is the main pollutant in Pinellas County? ▼
The primary pollutant in Pinellas County is Fine Particles (PM2.5), which was the main AQI driver on 145 days (53% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Pinellas County have? ▼
In 2025, Pinellas County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 129.
Is the air quality in Pinellas County getting better or worse? ▼
Air quality in Pinellas County is improving based on 5-year trends (2020-2025). Best year: 2022 with 226 good days. Worst year: 2025 with 190 good days.
What does AQI 44 mean for health? ▼
Pinellas County's median AQI of 44 falls in the "Good" category. See the <a href="/guides/understanding-aqi" class="underline">AQI category guide</a> for what each range means for health.
How does Pinellas County compare to other counties in Florida? ▼
Pinellas County has 69.3% good air days. Nearby counties in Florida: Alachua (90.1% good), Baker (69.1% good), Bay (60.6% good), Brevard (89.7% good), Broward (72.4% good), Citrus (67.8% good).
What is the 90th percentile AQI in Pinellas County? ▼
The 90th percentile AQI for Pinellas County is 58, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 129 (USG).
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer.
Every figure on PlainAir is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.